That song is called "The Mobile Goat" and was written by Tom Cahill about 35 years ago for one of his (then) annual Christmas concert/skit shows. It was popularized by Joan Morrissey on an LP about 1972. The LP was, if my memory serves me right, an Audat or an Arc record and, although it was a hugely popular hit within Newfoundland, probably wasn't distributed much outside Newfoundland. The song is based on a jocular legend from Mobile (pronounced MOE-ble) on the Southern Shore of the Avalon Peninsula of Newfoundland. The legend is that a man named Dillon was working in his garden, cathering his potatoes and trying, among other things, to ensure that a particularly aggressive goat didn't get into the garden to steal the potatoes. The goat was just outside his fence on the road. A priest came by and, stopping, asked Dillon how he was doing. He asked "Are you digging them, Dillon?" Dillon didn't realize there was anyone there and thought it was the goat speaking...

Anna McGoldrick has a comparatively recent version of it on her CD "It's the Irish in me." That's available from her web site.

Tom Cahill is still alive and active in St. John's.